import javafx.application.Application;
import javafx.stage.Stage;

import java.sql.SQLOutput;

public class Example09 extends Application {

    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage primaryStage) {
        int grade =75;
        if (grade > 80) {
            System.out.println("lsk该成绩为优");
        } else  if (grade>70) {
            System.out.println("lsk该成绩为良");
        }else  if (grade>60) {
            System.out.println("lsk该成绩为中");
        }else {
            System.out.println("lsk该成绩为差");
        }

    }
}
